Build Concrete Block Arches and Circles - No Template

blocklayer.com Directory

👈 Inch or Metric Search by Image

Build concrete core filled masonry block arches without a template See also: Masonry Arch Header Cut and Placement Calculator

An arch has 2 identical sets of cuts
(left and right sides). A bulls-eye (circle) has 4.

Scale

When the wall is core filled, the membrane (flashing) around the arch line stops the concrete. Remove off-cuts and extra blocks to reveal the arch.

Width
Height	In
Color

Cut all the blocks before construction. The cut blocks (all halves) that form the arch are numbered sequentially, with off-cuts numbered identically. Take the opening to spring height, then using a standard horizontal head support, go across the head, laying each cut in its place, its matching off-cut on top, with a membrane (aluminum flashing is ideal) between the two. Lay the cut, place the flashing on top of the cut line and lay the off-cut to lock membrane in place.
Use overlapping lengths of thick, strong (aluminum) flashing about 3 feet long so the flashing doesn't get in your way.

You can combine this Templateless Arch System with the Circular Wall System to easily build curved or circular (and raking) walls with arches or bulls-eyes. It's easy! If you'd like more detailed info on this, please contact us.

If you're cutting blocks, concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks
And if you're cutting wet, wear a mask - there's dust in the spray too!

How should we spell it?
Metre Meter		Results

Built something using our calculators? Please Send Photos!

If you've benefited from this free service please consider supporting Blue Dragon Children's Foundation

Please help promote this free service - Tell a Friend about this site!

Create PDF to print diagrams on this page. Help & Settings Printing Help (new window)

Copy all diagrams on this page to bottom of page - Make multiple copies to Print or Compare.

View page on Phone via QR Code (Not current calculation result)

blocklayer.com

All calculators on this site are geometric only.
Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.

Disclaimer | Privacy & Cookie Policy

Copyright © 2020 - blocklayer.com

Zoom 100%

Keyboard ◄ ►
Fine tune Sliders

Printing Help

Help & Settings

Share

↑ Remove Margins

blocklayer.com

If you've benefited from this free service please consider supporting
Please help us support Blue Dragon Children's Foundation

Built something using our calculators? Please Send Photos!